HS Code for Lag screws

Lag screws, also known as coach screws, are classified under HS code 7318.11. This classification is determined by the General Rules for the Interpretation of the Harmonized System (GRI), specifically identifying articles of iron or steel. Within Chapter 73, heading 7318 covers screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers, and similar articles. Subheading 7318.11 is specifically reserved for threaded coach screws. These fasteners are characterized by their heavy-duty construction, typically featuring a hexagonal or square head and a sharp, pointed thread designed for high-torque applications in timber or masonry with an anchor. The classification depends on the physical characteristics of the screw, specifically its heavy-duty nature and the specific thread type intended for wood-to-wood or wood-to-metal connections without the use of a nut.

Products Included

• Hex-head lag screws
• Square-head coach screws
• Galvanized steel lag bolts
• Stainless steel coach screws
• Zinc-plated heavy-duty wood screws

Common Misclassification

Lag screws are frequently misclassified under HS code 7318.12, which covers other wood screws. While lag screws are used in wood, 7318.11 is the more specific heading for coach screws. They are also sometimes confused with 7318.15, which covers other screws and bolts. The distinction lies in the thread design and the intended application; 7318.15 usually refers to machine screws or bolts intended for use with a nut or a pre-tapped hole, whereas lag screws create their own mating thread in the substrate.

FAQ

What is the HS code for lag screws?

The primary HS code for lag screws (coach screws) made of iron or steel is 7318.11.

How do lag screws differ from standard wood screws in classification?

Standard wood screws are generally smaller and classified under 7318.12, whereas lag screws are heavy-duty fasteners with specific head types (hex or square) and are explicitly named as coach screws under 7318.11.